Just got a popup notification in my Google Search Console that says:

Your site has been switched to Mobile First Indexing
The majority of Google's crawl requests to your site will be made using a mobile crawler.

Switch date: July 10, 2018

The notification is just a little late to the party.

Oh nevermind!! I was accidentally looking at a property that I never look at, so I really had not dismissed the notification since 2018.